﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp3
{
    class Shape//父类
    {

        private string Color;
        public string color { get; set; }
        public Shape()
        {

        }

        public virtual void GetArea(double num)
        {

        }

    }
}
